russia says ukraine's government will be held responsible for today's attacks. >> president obama is discussing ukraine this morning with a key u.s. ally german chancellor ainge la america angela merkel is visiting the white house. merkel is under pressure at home from german strips thatindustries that don't want to lose russia's business. >> now to the controversy over donald sterling. leon jenkins resigned last night after facing backlash. he chose sterling to receive a lifetime achievement award this month. >> that offer was withdrawn after sterling's racial remarks became public. and as we report sterling's health is suddenly an issue. >> reporter: just before the end of thursday night's playoff game, espn.com reported that disgraced clippers owner donald sterling is battling cancer. the news came as a surprise to clippers' coach doc rivers. >> didn't know it until just now. i don't have a reaction to that. i hope it's not true. >> my thoughts and prayers are with him. nobody deserves to go through something like that. >> we've got game seven coming up in los angeles. >> reporter